Reply To: The Library
OK, the book on substitution ciphers is now on Amazon.
It’s yellow.
It is also significantly longer than the blue one, but I convinced Amazon to keep the price the same.
Harry deletes the links, so just search for “Substitution Ciphers and how to break them”.
If there is enough interest, I might be able to make more, but they won’t be ready this season. I’m working on typesetting Gaines’s book and annotating it and adding new solutions. More on that later.